I'm no NFS expert but for development domains I use the following options:

rw,sync,no_subtree_check,all_squash,anonuid=36,anongid=36

I wonder if something subtle changed on upgrade that interacts poorly with your configuration?

On Wed, May 31, 2017 at 11:34 AM, Moritz Baumann <moritz.baumann@inf.ethz.ch> wrote:

Hi Adam,

Just an idea, but could this be related to stale mounts from when you rebooted the storage? Please try the following:

1. Place all nodes into maintenance mode
2. Disable the ovirt NFS exports
1. Comment out lines in /etc/exports
2. exportfs -r
3. Reboot your nodes
4. Re-enable the ovirt NFS exports
5. Activate your nodes

all storage domains (data/iso) are down, so is the data center (non-responsive) and no nfs mount is on any of the nodes.

I can however manually mount the data export and touch a file (as root).

So I think stale mounts is not the issue.

However I did the steps and the result is the same.

Best,
Mo

Adam Litke